Apple TV won’ t accept password that is utilized on our other internet connections

What is your model Apple TV? Identify your Apple TV model - Apple Support

Are you referring to the Wi-Fi password?

Passwords are generally case-sensitive, as you may know, so verify that.

Get help with Wi-Fi networks on your Apple TV - Apple Support

I have the same problem. Just bought a new Samsung Qled TV and it will not accept my Apple ID or password.